Ussingite

Ussingiet, Ussingit, Ussingita, Уссингит


Commonly known      rarer (so called collectors stones)      very rare (rarities)      extremely rare (world rarities)
relatively rare organic material


Formula: Na2AlSi3O8(OH)
Mineral class: Silicates
Crystal system: triclinic
Mohs scale: 6 - 7
Density (g/cm3): 2.48 - 2.50
Refractive index: 1.504 - 1.545
Cleavage: perfect
Colors: rose, blue-violet, red-violet
Luster: vitreous - greasy
Fluorescence: -
Pleochroism: -
Largest Ussingite crystal: 1 cm?
Deposits:
Kangerdluarssuk / West Greenland
Taseq / Ilímaussaq Complex / Narsaq / Kitaa Prov. / South Greenland
Lovozero Mts. and Khibiny Mts. / Kola Peninsula / Russia
Mont Saint-Hilaire / Quebec / Canada
Discovery: 1914
1st Description: 1915
Name: in honor of the Danish mineralogist Niels Viggo Ussing (1864 - 1911)

Ussingite Mineral



Ussingite

Size: 0.45 x 0.45 cm
Weight: 0.21 ct
Origin: Russia

Photo by kind permission of © www.irocks.com
Ussingite

Ussingite

Weight: 1.50 ct

Origin: Taseq / Ilímaussaq Complex / Narsaq / Kujalleq Municipality / Greenland

Photo by kind permission of © www.steveperrygems.com

Ussingite

Size: 0.86 cm
Weight: 1.32 ct
Origin: Taseq / Ilímaussaq Complex / Narsaq / Kujalleq Municipality / Greenland

Photo by kind permission of © Darlene Cobler

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